Answer:
Gretchen thinks she should multiply 3 by the number of apples in each bag, x, and add it to 3 times the number of bananas in each bunch, y, to find the total number of pieces of fruit.
Step-by-step explanation:
Let's imagine 3 bags of apples with 4 apples in each bag (3 x 4 = 12)
Let's imagine 3 bunches of bananas with 4 bananas in ea. bunch (3 x 4 = 12)
Thus, 12 + 12 = 24 pieces of fruit
vs.
4 + 4 + 4 (12) apples + 4 = 4 + 4 (12) bananas
Thus, 12 + 12 = 24
24 x 3 = 72 >> Uh - Oh !!